The Mu3e experiment: Toward the construction of an HV-MAPS vertex detector

Rudzki, Thomas; Augustin, Heiko; Deflorin, Marin; Dittmeier, Sebastian; Frauen, Florian; Immig, David Maximilian; Kim, Dohun; Aeschbacher, Frank Meier; González, Annie Meneses; Menzel, Marius; Perić, Ivan; Preuß, Sebastian; Schöning, André; Vigani, Luigi; Weber, Alena; Weinläder, Benjamin

doi:10.48550/arxiv.2106.03534

Cited by 2 publications

(2 citation statements)

References 7 publications

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“…The control system uses the MIDAS slow control system [21] with an SCS3000 unit [22] for the data acquisition of the sensor data, and to control the compressor, and the bypass valve. All sensors are connected to analogue voltage input terminals in the range of 0 V to 10 V, except for the thermocouples which are connected through amplifiers 15 . The compressor is controlled and monitored via analogue signals by the power converter.…”

Section: Control System and Interlockmentioning

confidence: 99%

Successful cooling of a pixel tracker using gaseous helium: studies with a mock-up and a detector prototype

Theodor¹,

Aeschbacher²,

Deflorin³

et al. 2023

Preprint

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We report the successful operation of a functional pixel detector with gaseous helium cooling. Using an accurate mock-up beforehand, the cooling was validated. We use a miniature turbo compressor to propel the helium at 2 g/s under ambient pressure conditions with gas temperatures above 0 °C. Our earlier results based on computational fluid dynamics simulations and a much simpler mock-up are confirmed. With this, we paved the path to cool pixel detectors in experimental particle physics at heat densities up to 400 mW/cm 2 using helium. This enables cooling of detectors with very low mass requirements, minimising the effects of multiple Coulomb scattering effectively. The concept presented here is not limited to pixel detector applications and can be used to cool any surface with comparable heat-densities, only limited by shaping the helium gas flow.

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Section: Control System and Interlockmentioning

confidence: 99%

Successful cooling of a pixel tracker using gaseous helium: studies with a mock-up and a detector prototype

Theodor¹,

Aeschbacher²,

Deflorin³

et al. 2023

Preprint

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“…The goal of this run was to integrate as many of the services required by the final experiment with demonstrator detectors, see Figure 2, and to operate it in a helium atmosphere within the Mu3e magnet with the muon beam turned on. A simplified demonstrator for the vertex detector based on MuPix10 on PCBs instead of HDIs has been built and was used for this purpose [9]. During operation it generated a heat load of about 100 W that was cooled using a simplified helium distribution system with a flow of helium of 2 g/s.…”

Section: Integration Run 2021 and Cosmics Run 2022mentioning

confidence: 99%

Searching for cLFV with the Mu3e experiment

Dittmeier¹

2022

Proceedings of 41st International Conference on High Energy Physics — PoS(ICHEP2022)

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The Mu3e experiment at the Paul-Scherrer-Institut (PSI) searches for the charged lepton flavour violating decay 𝜇 + → 𝑒 + 𝑒 − 𝑒 + . This decay mode is extremely suppressed in the Standard Model, such that any observation would be a clear signature for new physics being at play. The experiment will be conducted in two phases. In Phase I, a single event sensitivity of 2 × 10 −15 is projected to be reached using the Compact Muon Beamline present at PSI. To reach the ultimate sensitivity of 10 −16 in Phase II, an upgrade of the detector as well as a higher intensity muon beamline will be required.The detector system has to provide excellent tracking efficiency as well as momentum, vertex and time resolutions to reach the experimental goals. An unprecedentedly thin silicon pixel tracking detector is being constructed using HV-MAPS, ultra-light services and a gaseous helium cooling system. It is complemented by timing detectors consisting of scintillating fibres and tiles. The full detector is placed inside a solenoidal magnetic field of 1 T. A first run integrating several subdetector prototypes was successfully conducted at PSI in 2021. A second run using cosmic muons took place in the first half of 2022. While the design of the final detector components is being completed, the Mu3e experiment is entering the production stage. Commissioning of the final Phase I detector is planned to start in 2023. In this publication, the status of the Mu3e experiment is presented.

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The Mu3e experiment: Toward the construction of an HV-MAPS vertex detector

Cited by 2 publications

References 7 publications

Successful cooling of a pixel tracker using gaseous helium: studies with a mock-up and a detector prototype

Successful cooling of a pixel tracker using gaseous helium: studies with a mock-up and a detector prototype

Searching for cLFV with the Mu3e experiment

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